Tuesday, March 6, 2012

Reversing Subtraction (So You Can Add)

Fantastic independent work by Casey and Katherine! They used Google drawing to show their subtraction strategy on a number line.
67 - __ = 34 becomes
34 + __ = 67 (reversing)
34 + 30 = 64 , 64 + 3 = 67

34 + 33 = 67 or 67 - 33 = 34
Posted by at
Labels: ,

2 comments:

  1. AnonymousMarch 6, 2012 at 3:53 PM

    Great work girls And what is the answer?Mr M do when will I get my green card?

    67 - __ = 34 becomes
    34 + __ = 67 (reversing)
    34 + 30 = 64 , 64 + 3 = 67

    34 + 33 = 67 or 67 - 33 = 34

    ReplyDelete
    Replies
    1. Mr MoriartyMarch 6, 2012 at 3:57 PM

      The answers are 33 lollies got eaten (it's in bold, underlined) and tomorrow!

      Delete

Subscribe to: Post Comments (Atom)